Slippery Jack mushroom, also known as the sticky bun. Listed as edible but some people do have allergic reactions to it.
Squid. I'm pretty sure this is squid, but be careful where you ask for it, as I think it also means a condom.
Schnapps. Eau-de-vie. Broadly applied to all the principal indigenous spirits of the Scandinavian countries. This is a colourless, grain or potato based spirit. The best known brand in the world is Danish, but it is produced throughout Scandinavia. It is flavoured with cumin and aniseed or fennel. It should be served really very cold and is often drunk with beer before or after a meal.
Grenadier or rat-tail; a long, tapering, ash grey marine fish found up to 90 cm (36") long, deep in the Atlantic. Not a very attractive fish and difficult to skin and fillet, so good in soups.